Device on double warp rib frames for producing pattern stripes running in zig-zag lines in the fabric



March 16, 1937.

2,073,961 PRODUCING PATTERN FABRIC M. DALLOS DEVICE 0N DOUBLE WARP RIB FRAMES FOR STRIPES RUNNING IN ZIG-ZAG LINES IN THE Filed May 1, 1956 2 Sheets-Sheet 1 March 16, 1937. M. DALLOS 2,073,961

DEVICE ON DOUBLE WARP RIB FRAMES FOR PRODUCING PATTERN STRIPES RUNNING IN ZIG-ZAG LINES IN THE FABRIC Filed May 1, 1936 2 Sheets-Sheet 2 frwendor;

Max Dallas.

y wwww Patented Mar. 16, 1937 DEVICE N DOUBLE RIB FRAMES FOR I PRODUCING PATTERN STRIPES RUNNING IN ZIG-ZAG LINES EN THE FABRIC Max Dallos, Budapest, Hungary, assignor of onehalf to Max Gluck, Budapest, Hungary Application May 1, 1936, Serial No. 77,405 In Hungary May 10, 1935 g 3 Claims.

, Devices on double warp rib frames for producing pattern stripes running in zig-zag lines in the fabric are known in which the groups of eye needles guiding the pattern threads are shifted Z; by this device in the direction of the width of the fabric. The leads of the shiftable groups of eye needles are in these devices mounted on a rail which is guided on a bar.

According to the invention the problem of the shifting is solved in such a manner that an intermittent reciprocating movement determined by the pattern chain is imparted to one or other of the bars of the double warp rib frame, besides the known movement in longitudinal direction.

The device according tothe invention, as it drives itself the usual bar, is much simpler and cheaper than the devices hitherto known, it requires no considerable alteration of the usual net knitting frames and can be easily mounted on and if necessary again removed from frames already in service. In a preferred form of construction of the invention a screw spindle having a pitch corresponding to the fine'pitch of the frame'and extending from the internally screw threaded socket extension is employed for the additional drive of the bar, which spindle always ensures accurate working.

Another advantage of the device according to the invention is that, when producing pattern.

30 stripes which are closer together or farther apart, it is not necessary either to remove or exchange the groups of needles or to accurately readjust the same, seeing that the separate threads producing the stripes can be threaded as desired to 5 the requisite distance apart into the groups of eye needles which are left undisturbed directly on the bar and in their position accurately ranged side by side. 7

An embodiment of the invention is illustrated 40 by way of example in the accompany drawings in which:

Fig. 1 shows in cross section the supplemented bar carrying the eye needles.

Fig. 2 is a side elevation of Fig. 1.

Fig. 3 shows in front elevation partly diagrammatically the arrangement of the supplemented knitting frame on a smaller scale.

Fig. 4 is a top plan view of the device.

50 In Figs. 1 and 2 the bar M is shown with eye needles U arranged side by side, fixed by screws V and carrying the usual leads N. The bar second from the front is preferably employed as supplementing bar according to the invention in 55 view of the spatial arrangement of the double rib PATENT OFFICE frames and the motions according to the invention.

The employment of the additional device according tothe invention necessitates only the following slight alterations on the knitting frame: For ensuring the freedom of movement of the constructional parts the spreader arms K are removed from the selected bar M (Fig. 3). This can be easily carried out and does not influence the corresponding position of the bar guided in 10 the usual manner at other points. The short sleeve C (Figs. 1, 2, 4) internally screw threaded is then fitted on the bar without difficulty by means of a fixing screw without disturbing the remaining parts of the knitting frame, and finally 15 the buffer head T (Fig. 4), hitherto bolted on one end of the bar, is mounted in the axle end of the screw spindle S to be fitted according to the invention. This buffer head T on the one hand slides on the transverse face of the sliding part or carriage 0 during the usual axial oscillations of the base and on the other hand takes up the thrust movementsof the carriage O in longitudinal direction. The carriage 0 controls the knitting of the pairs of pattern stripes to be produced as desired with close or less close pattern by means of a rod system similarly to the chains of the jacquard frame under the infiuencerof the usual pattern chain (not shown). The bar M or the device connected therewith, that is also the buffer head T is pressed back towards the iding face of the carriage 0 after each stroke caused by the pattern chains, by means of the usual spring R (Figs. 3, 4).

The screw threaded sleeve C is connected, as already mentioned, with the screw spindle S which may be of any desired length. The screw threaded portion of the spindle should be at least as long as the width of the fabric to be provided with pattern stripes on the knitting frame. The screw spindle S carries a bevel wheel D which cooperates with a bevel wheel E fixed on the frame of the device according to the invention, the ratio of transmission of the pair of bevel wheels D, E corresponds with the desired rotation of the screw spindle, that is with an additional movement of the bar M according to the invention. The axle of the bevel wheel E carries two wheels F, F1 provided with oppositely directed ratchet teeth with which the pawls G and G1 respectively can cooperate (Figs. 3 and 4). These pawls can alternately engage in their corresponding ratchet 1 wheels F, F1 in the following manner:-

The pawls are mounted on a carrier P (only partly shown), movably mounted on the frame of the device according to the invention, which carrier is acted upon by a spring R1 similar to the spring R of the bar M and fixed on an immovable part of the device. In the end of the carrier P a stop T1, similar to the above mentioned bufier head T, is screwed for the purpose of accurately regulating the stroke which stop is pressed against-a carriage 01 similar to but independent from the carriage O. The carriage O1 is controlled by the middle rod system Z (Fig. 3) from the pattern chain L, the links of which are assembled in known manner-according to the pattern of the closely knitted pattern stripe to be produced.

The carrier P carries the pawlsG, G1 by means of a two-armed lever I-I (Fig. 3 the pivot pin of which is mounted on the carrier P and has a hand crank H1 or a knob (Figs. 3 and 4). By turning the crank, the pawls G, G1 can be thrown over and the lever H fixed in this thrown over position by any suitable means.

The device according to the invention operates in the following manner:The parts of the pairs of pattern stripes extending in any desired curved line or for. example in zig-zag lines are produced from component parts which are actually low yet vertically displaced relatively to each other in the direction of the width. Consequently, during the production of each component part the carriages 0. and 01 (although mutually independent) move with the same stroke, that is the pattern chains of the two carriages are the same corresponding to these component parts. By the action of the strokes of the carriage O and of the carriage O1 moved with the same the barM moves backwardsand forwards in the longitudinal direction together with the groups of eye needles U of the bar mounted thereon, thereby producing a part of the pattern stripe. As soon asapart has been produced, the projecting links of the pattern chain L themselves act on the carriage 01 with a greater stroke, so that the carrier P is shifted in the longitudinal direction of the bar M and, through the intermediary of pawl, ratchet wheel, bevel wheels and screw spindle, the bar M is moved on a distance exceeding the ordinary movement. Whilst the screw spindle S feeds the bar M with the additional stroke according to the invention, a diagonal pair of pattern stripes is produced. Hereafter the pawls G, G1 are thrown over, that is the pawl which is actually operating is rendered'inoperative and the other pawl brought into operative position, so that the bevel wheels D, E and the screw spindle S are steered in the opposite direction and consequently a pair of oblique pattern stripes extending in the opposite direction to the preceding pair is produced.

The throwing over of the lever H carrying the pawls G, G1 may be effected not only by hand, but also automatically, for which purpose any known devices, such as a reversing rod system, may be employed.

I claim:

1. A device on double Warp rib frames for production of pattern stripes extending in zig-zag lines in the fabric, comprising in combination bars of the frame, groups of eye needles on said bars, means for actuating said bars, an intermittently operating driving mechanism acting on one of said bars to impart thereto an additional movement in the longitudinal direction of the bar, said mechanism comprising a screw spindle, a pair of ratchet wheels connected to said mechanism, pawls one for each of said ratchet wheels, and means for alternately engaging said pawls with their respectiveratchet wheel.

2. In a device as claimed in claim 1 the combination of a frame, a carrier movably mounted in said frame, a stop on said carrier, a carriage contacting with saidstop, and a pattern chain cooperating with said carriage.

3. In a device as claimed in claim 1 the combination of aframe, a carrier movably mounted in said frame, an adjustable stop on said carrier, a carriage contacting with said stop and a pattern chain co-operating with said carriage.

MAX DALLOS. 

